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path: root/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c
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Diffstat (limited to 'drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c')
-rw-r--r--drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c81
1 files changed, 14 insertions, 67 deletions
diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c
index ffe624ed0c0c..4b415cc76715 100644
--- a/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c
+++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c
@@ -5,6 +5,7 @@
* Copyright (c) 2003-2004, Jouni Malinen <jkmaline@cc.hut.fi>
*/
+#include <linux/fips.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
@@ -17,9 +18,8 @@
#include "ieee80211.h"
+#include <crypto/arc4.h>
#include <crypto/hash.h>
-#include <crypto/skcipher.h>
- #include <linux/scatterlist.h>
#include <linux/crc32.h>
MODULE_AUTHOR("Jouni Malinen");
@@ -49,9 +49,9 @@ struct ieee80211_tkip_data {
int key_idx;
- struct crypto_sync_skcipher *rx_tfm_arc4;
+ struct arc4_ctx rx_ctx_arc4;
+ struct arc4_ctx tx_ctx_arc4;
struct crypto_shash *rx_tfm_michael;
- struct crypto_sync_skcipher *tx_tfm_arc4;
struct crypto_shash *tx_tfm_michael;
/* scratch buffers for virt_to_page() (crypto API) */
@@ -62,19 +62,14 @@ static void *ieee80211_tkip_init(int key_idx)
{
struct ieee80211_tkip_data *priv;
+ if (fips_enabled)
+ return NULL;
+
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
goto fail;
priv->key_idx = key_idx;
- priv->tx_tfm_arc4 = crypto_alloc_sync_skcipher("ecb(arc4)", 0, 0);
- if (IS_ERR(priv->tx_tfm_arc4)) {
- printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate "
- "crypto API arc4\n");
- priv->tx_tfm_arc4 = NULL;
- goto fail;
- }
-
priv->tx_tfm_michael = crypto_alloc_shash("michael_mic", 0, 0);
if (IS_ERR(priv->tx_tfm_michael)) {
printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate "
@@ -83,14 +78,6 @@ static void *ieee80211_tkip_init(int key_idx)
goto fail;
}
- priv->rx_tfm_arc4 = crypto_alloc_sync_skcipher("ecb(arc4)", 0, 0);
- if (IS_ERR(priv->rx_tfm_arc4)) {
- printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate "
- "crypto API arc4\n");
- priv->rx_tfm_arc4 = NULL;
- goto fail;
- }
-
priv->rx_tfm_michael = crypto_alloc_shash("michael_mic", 0, 0);
if (IS_ERR(priv->rx_tfm_michael)) {
printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate "
@@ -104,9 +91,7 @@ static void *ieee80211_tkip_init(int key_idx)
fail:
if (priv) {
crypto_free_shash(priv->tx_tfm_michael);
- crypto_free_sync_skcipher(priv->tx_tfm_arc4);
crypto_free_shash(priv->rx_tfm_michael);
- crypto_free_sync_skcipher(priv->rx_tfm_arc4);
kfree(priv);
}
@@ -120,11 +105,9 @@ static void ieee80211_tkip_deinit(void *priv)
if (_priv) {
crypto_free_shash(_priv->tx_tfm_michael);
- crypto_free_sync_skcipher(_priv->tx_tfm_arc4);
crypto_free_shash(_priv->rx_tfm_michael);
- crypto_free_sync_skcipher(_priv->rx_tfm_arc4);
}
- kfree(priv);
+ kzfree(priv);
}
@@ -290,10 +273,8 @@ static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
u8 *pos;
struct rtl_80211_hdr_4addr *hdr;
struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
- int ret = 0;
u8 rc4key[16], *icv;
u32 crc;
- struct scatterlist sg;
if (skb_headroom(skb) < 8 || skb_tailroom(skb) < 4 ||
skb->len < hdr_len)
@@ -334,21 +315,15 @@ static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
*pos++ = (tkey->tx_iv32 >> 24) & 0xff;
if (!tcb_desc->bHwSec) {
- SYNC_SKCIPHER_REQUEST_ON_STACK(req, tkey->tx_tfm_arc4);
-
icv = skb_put(skb, 4);
crc = ~crc32_le(~0, pos, len);
icv[0] = crc;
icv[1] = crc >> 8;
icv[2] = crc >> 16;
icv[3] = crc >> 24;
- crypto_sync_skcipher_setkey(tkey->tx_tfm_arc4, rc4key, 16);
- sg_init_one(&sg, pos, len + 4);
- skcipher_request_set_sync_tfm(req, tkey->tx_tfm_arc4);
- skcipher_request_set_callback(req, 0, NULL, NULL);
- skcipher_request_set_crypt(req, &sg, &sg, len + 4, NULL);
- ret = crypto_skcipher_encrypt(req);
- skcipher_request_zero(req);
+
+ arc4_setkey(&tkey->tx_ctx_arc4, rc4key, 16);
+ arc4_crypt(&tkey->tx_ctx_arc4, pos, pos, len + 4);
}
tkey->tx_iv16++;
@@ -357,12 +332,7 @@ static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
tkey->tx_iv32++;
}
- if (!tcb_desc->bHwSec)
- return ret;
- else
- return 0;
-
-
+ return 0;
}
static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
@@ -376,9 +346,7 @@ static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
u8 rc4key[16];
u8 icv[4];
u32 crc;
- struct scatterlist sg;
int plen;
- int err;
if (skb->len < hdr_len + 8 + 4)
return -1;
@@ -412,8 +380,6 @@ static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
pos += 8;
if (!tcb_desc->bHwSec) {
- SYNC_SKCIPHER_REQUEST_ON_STACK(req, tkey->rx_tfm_arc4);
-
if (iv32 < tkey->rx_iv32 ||
(iv32 == tkey->rx_iv32 && iv16 <= tkey->rx_iv16)) {
if (net_ratelimit()) {
@@ -434,23 +400,8 @@ static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
plen = skb->len - hdr_len - 12;
- crypto_sync_skcipher_setkey(tkey->rx_tfm_arc4, rc4key, 16);
- sg_init_one(&sg, pos, plen + 4);
-
- skcipher_request_set_sync_tfm(req, tkey->rx_tfm_arc4);
- skcipher_request_set_callback(req, 0, NULL, NULL);
- skcipher_request_set_crypt(req, &sg, &sg, plen + 4, NULL);
-
- err = crypto_skcipher_decrypt(req);
- skcipher_request_zero(req);
- if (err) {
- if (net_ratelimit()) {
- netdev_dbg(skb->dev, "TKIP: failed to decrypt "
- "received packet from %pM\n",
- hdr->addr2);
- }
- return -7;
- }
+ arc4_setkey(&tkey->rx_ctx_arc4, rc4key, 16);
+ arc4_crypt(&tkey->rx_ctx_arc4, pos, pos, plen + 4);
crc = ~crc32_le(~0, pos, plen);
icv[0] = crc;
@@ -655,17 +606,13 @@ static int ieee80211_tkip_set_key(void *key, int len, u8 *seq, void *priv)
struct ieee80211_tkip_data *tkey = priv;
int keyidx;
struct crypto_shash *tfm = tkey->tx_tfm_michael;
- struct crypto_sync_skcipher *tfm2 = tkey->tx_tfm_arc4;
struct crypto_shash *tfm3 = tkey->rx_tfm_michael;
- struct crypto_sync_skcipher *tfm4 = tkey->rx_tfm_arc4;
keyidx = tkey->key_idx;
memset(tkey, 0, sizeof(*tkey));
tkey->key_idx = keyidx;
tkey->tx_tfm_michael = tfm;
- tkey->tx_tfm_arc4 = tfm2;
tkey->rx_tfm_michael = tfm3;
- tkey->rx_tfm_arc4 = tfm4;
if (len == TKIP_KEY_LEN) {
memcpy(tkey->key, key, TKIP_KEY_LEN);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.